As a follow up to my earlier post, I just installed it on both my aging desktop PC and my newer HP Elitebook.
Played a little campaign and some of the Prologue battles.
PC specs:
Q6600 2.4 overclocked to 3.0 Ghz
8 GB DDR2 RAM
Radeon 4870 1GB
Win 7 64 bit
Played at 1680 x 1050
The game first set me on Ultra, which gave 15-20 fps in combat, mid-high 20s in campaign.
I reduced all settings to very high, and disabled all the nice effects, resulting low-mid 20 fps in combat, and high 20/low 30 fps on the map, which for me is playable and about what I was getting in Empire.
On my i5 3360M @2.8 GHz SSD Elitebook
Video: ATI HD 7570m 1GB
8 GB RAM
Win 7 64
Installed very fast amd played briefly at 1600x900 and I reduced most settings one step lower to High and found combat still dips well below 20 fps while campaign feels more stable in the low 20's.
Now I must find time to play.